Ubuntu.comUB:CVE-2019-18675CVE-2019-18675
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
5.3%
The Linux kernel through 5.3.13 has a start_offset+size Integer Overflow in
cpia2_remap_buffer in drivers/media/usb/cpia2/cpia2_core.c because cpia2
has its own mmap implementation. This allows local users (with /dev/video0
access) to obtain read and write permissions on kernel physical pages,
which can possibly result in a privilege escalation.
Notes
| Author | Note |
|---|---|
| sbeattie | this type of vulnerability was fixed generically via be83bbf80682; see the reference in lore from gregkh above |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | linux | <Â 4.15.0-36.39 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux | <Â 4.4.0-134.160 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-aws | <Â 4.15.0-1023.23 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-aws | <Â 4.4.0-1066.76 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-azure | <Â 4.15.0-1025.26~16.04.1 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-gcp | <Â 4.15.0-1021.22~16.04.1 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-hwe | <Â 4.15.0-36.39~16.04.1 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-kvm | <Â 4.15.0-1023.23 | UNKNOWN |
| ubuntu | 16.04 | noarch | linux-kvm | <Â 4.4.0-1032.38 | UNKNOWN |
| ubuntu | 18.04 | noarch | linux-oem | <Â 4.15.0-1021.24 | UNKNOWN |
References
deshal3v.github.io/blog/kernel-research/mmap_exploitation
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/media/usb/cpia2/cpia2_core.c
launchpad.net/bugs/cve/CVE-2019-18675
lore.kernel.org/lkml/[email protected]/
lore.kernel.org/lkml/[email protected]/
nvd.nist.gov/vuln/detail/CVE-2019-18675
security-tracker.debian.org/tracker/CVE-2019-18675
www.cve.org/CVERecord?id=CVE-2019-18675
Related
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.0004 Low
EPSS
Percentile
5.3%